2:00 PM - 2:15 PM
[SSS06-02] Deep Drilling at the Nankai Trough: IODP NanTroSEIZE Expedition 358 Summary and First Results
Keywords:Nankai Trough, IODP , megathrust
Drilling commenced with a sidetracking operation to establish Hole C0002Q, which was advanced to 3263 mbsf, but operational difficulties precluded going any deeper. Two more attempts were made to advance the riser hole over many weeks, but ultimately did not result in further progress toward the objective. At the time of this writing, coring operations are ongoing at the site at a depth of about 2900 mbsf, in deformed and steeply-dipping mid-Miocene age inner accretionary wedge rocks. There are plans to end riser operations at Site C0002 at the end of February 2019 despite not reaching the primary target, and instead commence drilling at a new site to target the frontal thrust portion of the plate boundary near previous IODP Site C0006. First results from the expedition will be reviewed in this presentation, and a preliminary assessment of the scientific outcomes will be made.